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Andrea Bacciu

Sapienza University of Rome

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#artificial intelligence Preprint Oct 2026

Wiki-Talkie: Multilingual Benchmarking of Persona-Based Agents on Real-World Discussions

LLMs are increasingly deployed as autonomous agents in social environments, making it critical to study their ability to faithfully simulate human interactions. Central to this is grounding agents in realistic user personas, yet existing datasets rely on fictional personas and are limited to a handful of languages, lac...

Dennis Fucci, Andrea Bacciu, Dong Liu et al. · 0 citations
#natural language process... Preprint Jul 2026

Estimating Uncertainty from Reasoning: A Large-Scale Study of Multi- and Crosslingual MCQA Performance in LLMs

It is found that prompting models to reason in English while keeping questions in low-resource languages substantially improves UE performance, suggesting that comprehension of low-resource languages is largely intact, and that the reliability bottleneck lies in generation rather than understanding.

Andrea Alfarano, Andrea Bacciu, Saab Mansour et al. · 0 citations
#natural language process... Preprint Aug 2026

QUORUM: QUality-Optimized Routing Using Multiple annotators

This work introduces QUORUM (QUality-Optimized Routing Using Multiple annotators), a budget-aware routing framework that dynamically assigns each instance to human or LLM annotators under a fixed annotation budget and supports multiple annotations per instance, combining them through agreement-based rewards to improve...

Antonio Purificato, Maria Sofia Bucarelli, Andrea Bacciu et al. · 1 citation

Select, Label, Evaluate: Active Testing in NLP

This work formalizes Active Testing in NLP and conducts an extensive benchmarking of existing approaches across 18 datasets and 4 embedding strategies spanning 4 different NLP tasks, revealing variations in method effectiveness across different data characteristics and task types.

Antonio Purificato, Maria Sofia Bucarelli, Andrea Bacciu et al. · 1 citation

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